Which of the following statements about blood
cells in solutions is CORRECT?
a. A blood cell placed in an isotonic solution
will swell.
b. A blood cell placed in a hypotonic solution
will swell.
c. A blood cell placed in a hypotonic solution
will shrink.
d. A blood cell placed in an isotonic solution
will shrink.
e. A cell placed in a hypotonic solution will
remain the same size.
B
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The polymerase chain reaction (PCR) is used to:
A. generate single copies of whole chromosomes. B. generate multiple copies of whole chromosomes. C. generate a single copy of a targeted region of DNA. D. generate multiple copies of a targeted region of DNA. E. b and d.
A myelin sheath functions to ____
a. protect axons b. allow nerve cells to divide c. trigger action potentials d. increase electrical propagation speeds e. promote neurotransmitter release
Succession that begins on bare rock after glaciers have passed, or on newly formed volcanic islands, is
A) primary. B) allogenic. C) secondary. D) pioneer. E) autogenic.
The long-term chemical energy storage molecules in plants are steroids
Indicate whether the statement is true or false